Circulating water chiller Keywords: industrial cold water machine, air-cooled cold water machine, water-cooled cold water machine, laser cold water machine low temperature chiller cooler water chillers, water-cooled chiller operation Chuanhui cold water machine series : industrial cold water units, air-cooled cold water machine, water-cooled cold water machine, PCB cold water machine, PCB air-cooled cold water machine, PCB water-cooled cold water machine, PCB circulating cold water, industrial circulating cold water machine CHEMICAL cold water machines, mold cold water machine, laser cold water machine, cold water machine tools, water chilled water machines, wind chilled water machine, Shenzhen cold water machine, circulating cold water machine, cold water machine factory, cold water machine principle , cold water machine functions as a working principle of freezing cold water machine water machine, also known as freezers, chillers, refrigeration systems based on the principle of low temperature and pressure liquid refrigerant in the evaporator inside and around the water heat exchange evaporator heat absorption of water , evaporated into low-pressure gas, the evaporation temperature of the refrigerant during the constant, low temperature and pressure gaseous refrigerant into the compressor, compressed by the compressor, is compressed into a high-temperature high-pressure gas, and then into the condenser, the condenser in the indoor The heat exchange medium, high temperature and pressure of the gaseous part of the heat is absorbed by the medium, medium temperature, high temperature and high pressure refrigerant liquid into the condenser heat, the condenser constant process temperature, and then enters the expansion valve is throttled, throttling rapid cooling process, the refrigerant becomes low temperature low pressure liquid refrigerant after re-entry process to the evaporator heat exchanger evaporator, in order to achieve the whole process of the refrigeration system, this cycle is performed continuously, the water was able to continuously refrigeration; category 2, cold water machine 1, according to cooling (cooling) mode A, a water-cooled: (shell and tube) condenser cooling tower installation. B, air-cooled: (finned) condenser cooling fan by the machine itself. 2, according to shape the structure of A, enclosed chiller: an outer sheet metal box with a water pump and water tank inside ["air, water can this statement"]. B, open chiller: no external box (shell), an evaporator, a condenser is shell and tube type, compressors placed on top of the evaporator, no water pump, to additionally equipped with tanks and circulation pumps. 3, according to the structure of the evaporator A, closed chiller: evaporator means is enclosed (shell and tube), the pump can be placed inside the device can also be external, can have housing, you can not shell condenser According to air-cooled or water-cooled to decide. B, open chiller: evaporator is open, the evaporator coil type of steel, which is placed in the tank, the condenser is determined based on air-cooled or water-cooled. 4, in the electroplating industry and oxidation A, straight-cooled chiller: means a direct or oxidation tank plating bath circulation liquid inside. 5. The application range of the compressor structure A, piston B, scroll-type C, screw-type D, centrifugal three, cold water machine 1, UV curing machine: Features: stepless dimming + water cooling + metal halide = saving + Low + high efficiency, light indoor water-cooled (Chuanhui chiller chilled water) + air-cooled heat, the installation of insulation underneath the quartz glass tube, effectively reducing the illuminated surface temperature, protect the dried goods will not heat deformation, extend lamp life; CBE cooled Series for: offset, gravure, flexo printing machine, glazing coating machine printing equipment at home and abroad. Offset such as: Germany MAN Roland, Heidelberg, KBA, Komori, Ming-liang, Mitsubishi, Sakurai, the North and the like. Gravure printing machine such as: Bobst, Italy Cerutti, Xi'an black one, Zhongshan Ostersund section User: CSUN (Guangzhou) Technology Limited; 2, ultrasonic cleaning machine: The studies have shown: the role of ultrasound in liquid When the liquid in each bubble burst will have a great shock wave of energy, equivalent to instantly generate high temperature of several hundred degrees and up to thousands of atmospheres, a phenomenon known as "cavitation", is the use of ultrasonic cleaning liquid bubble burst shockwave to achieve the role of cleaning and scouring inner and outer surfaces of the workpiece. Second ultrasonic propagation in the liquid, the liquid, together with the cleaning tank vibration at ultrasonic frequency, fluid and has its own natural frequency of vibration of the cleaning bath, the vibration frequency of the sound frequency, so people can hear the hum. Cleaning fluid optimum cleaning temperature is 40-60 ℃, in particular if the cleaning liquid temperature of the effects of altitude difference in cold weather, the cleaning effect is poor. Therefore, some washing machine in the wash tank outside around the heating temperature control heating wire, when the temperature rises cavitation prone, so cleaning is better. When the temperature continues to rise, increasing the gas pressure inside the cavity, causing the impact sound pressure decreased, reflecting the synergistic action of these two factors. Final classics on factors Chuanhui licensing of industrial chillers reduce the temperature of the cleaning agent, condensing the gaseous cleaning agents effectively prevent the volatile cleaning agent 3, plastics injection compression molding blown film extrusion blow molding, rolling film standard industrial chillers are It can be applied to these sectors. A, injection mold cooling the heated plastic pellets melted into a mold, after condensation, mold ejection of the molded plastic parts in a continuous production process has required the mold is cooled to reduce plastic setting time, increase the dimensional accuracy of the workpiece, molding quality, surface quality. Cold water temperature requirements: 6 ... 18 ℃ cold water temperature requirements: ± 2K or ± 0.5K chiller cooling capacity and the injection molding machine injection amount (usually referred to as "ounces"), the greater the amount of injection, the required cooling capacity is also large . Injection molding machine usually "Tons" nominal clamping force, which requires the "tonnes" to "oz", but "several tons" and "ounces" is not one to one, the following table only the conversion relationship under normal circumstances, and there is a certain upper and lower deviation. Tonnage Tonnage oz 10 oz 220 0.24 0.64 18.4 20 250 22.1 30 1.1 300 28.5 350 35.3 40 1.7 50 2.3 60 3.0 450 50.2 400 42.6 500 58.2 75 4.1 90 5.3 80 4.5 550 66.5 600 75.1 100 84.0 110 6.1 650 7.0 850 122 120 7.9 1000 154 130 8.8 1200 198 140 9.8 1400 246 150 10.8 1600 297 160 11.8 1800 350 180 13.9 2000 405 200 16.1 4000 1070 B, extruded extruded pipe, duct, cables and plastic profiles. After a cold water bath, cold water bath water temperature must be kept constant heat to melt raw material after molding. Because of high production speed, because the surface need large capacity chillers. If you have been frozen since the pool is large enough, the unit may not deserve tank. C, blowing mainly produce various kinds of mineral water bottles, soda bottles. Compressed air - blowing required clean, dry compressed air, the use of industrial chillers provide cold water for cooling the compressed air source can be removed in the water. Mold cooling - Chiller can accurately control the mold temperature, improve product quality, increase productivity and mold cooling air drying can use the same water cooler as a cold source D, thermoformed products for some of the most common small containers such as yogurt cups plastic in constant frequency heated extrusion die to maintain a constant temperature is very important for the chilled water temperature range is very high, and therefore requires a proportional valve from the cold water, but to precisely regulate the temperature. E, hydraulic system mold clamping, injection materials are required to complete the hydraulic system, hydraulic oil pump energy absorption temperature rises, usually oil temperature must not exceed 60 ℃. Cooling water temperature around 27 ℃ more appropriate, since the claim is not the same as the temperature of the mold, requiring electric valve mold cooling circuits and separate or need a separate cooling system. 4, mechanical industry A, laser technology laser laser (laser) system generating source, the beam controller and the cabinet may require additional cooling. Of cold water temperature requirements are usually between 15 ... 22 ℃, accuracy of cold water is usually ± 1K or ± 2K. Some of the equipment may be required ± 0.5K, another part of the device for freezing water conductivity, corrosion resistance and have certain requirements. Laser systems typically start water temperature there are certain requirements, which will require an increase in electric heating water circuit. In the part of the system of the beam controller will require separate cooling circuit. Laser systems for special applications, can specially design industrial chillers to meet different requirements. B, welding electrodes, welding furnace and cutter etc. need to be cooled. Such as large and medium-sized welding electrode tip cooling; gold and silver jewelry processing furnace cooling is usually small to medium-sized chiller. Need external circulation pump system or a closed tank system. C, cutting a lot of cutting machine tools (machining centers, lathes, milling, drilling, etc.) requires a tool or spindle rotation speed to generate heat in the cutting process also generates a lot of heat. In these machine tools are usually part to be cooled spindle, cutting fluids, lubricating oil, hydraulic oil, cabinet and so on. D, non-cutting machining such as EDM machines, polishing machines, grinding machines. When using water chiller system turning blocked some of the iron, because some required the installation of filters. Need external circulation pump system or a closed tank system. Third, Chuanhui cold water machine selection 1, by cooling water (oil) inlet and outlet temperature difference to calculate the amount of heat Q = SH × De × F × DT / 60 Q: heat KW (note: Chuanhui 1P cold water machine fever is about 3KW) SH: ratio of specific heat of water 4.2KJ / Kg * C (4.2 kJ / kg * Celsius) heat oil is 1.97KJ / Kg * C (1.97 kJ / kg * Celsius) De: proportion proportion of water 1Kg / L (1 kg / liter) Specific gravity oil 0.88Kg / L (0.88 kg / l) F: Flow LPM (L / min l / min) DT: cooling water (oil) into outlet temperature difference (outlet temperature - inlet temperature) Note: ¨ / 60¨ for the flow L / min into l / s; 1kW = 1kJ / s; Example 1: the cooling water inlet is 15 degrees, 20 degrees water, flow rate 20 l / min heat Q = 4.2 × 1 × 20 × (20-15) / 60 = 7KW When selecting chiller cooling capacity may be appropriate to increase 20% -50% can choose CBE-03W Example 2: Cooling oil When imports were 18 degrees, 26 degrees out of oil, a flow of 15 liters / minute heat Q = 1.97 × 0.88 × 15 × (26-18) / 60 = 2.6KW select cold water cooling (oil) machine can be appropriate to increase 20% -50% can choose CBE-02A 2, through the power of the device, heat estimating a, as for the spindle cooling, according to 30% of the spindle motor power refrigeration unit cooling capacity needed to estimate. Example: 15KW motor, optional 4.5kw or 5.8kw cooling capacity of refrigeration units; b, the injection molding machine can be cold 0.6KW per ounce or per estimate 80 tons of cooling capacity 3KW to account; 3, through water (oil ) box temperature rise calculated calorific value Q = SH × De × V × DT / 60 Q: heat KW SH: water ratio of specific heat of 4.2KJ / Kg * C (4.2 kJ / kg * C) Oil The specific heat of 1.97KJ / Kg * C (1.97 kJ / kg * ° C) De: the proportion of the proportion of water 1Kg / L (1 kg / liter) gravity oil 0.88Kg / L (0.88 kg / liter) V: Water Capacity L (liters) comprises a tank and piping in the total water capacity DT: water (oil) in a minute maximum temperature Note: ¨ / 60¨ for the temperature ° C / min becomes ° C / sec; 1kW = 1kJ / s; Note: when measuring, water (oil) tank temperature should be slightly lower than the ambient temperature; and the device is working at maximum load. Example: tank volume 3000L maximum temperature 0.6 degrees / min heat Q = 4.2 × 1 × 3000 × 0.6 / 60 = 126KW when selecting chiller cooling capacity may be appropriate to increase 20% -50% can choose CBE-50W; supplement Description: 1, chiller cooling capacity of the ambient temperature and the water temperature varies; 2, the device will be the actual amount of heat because of the different parts, molds, and other parameters change; 3, the temperature dropped after use chillers, connecting pipe Road, water tanks, fuel tanks, molds, spindle, the device surface temperature below ambient temperature, and therefore lead to absorb heat load increases; 4, in practical industrial applications in many cases cooling can not be accurately calculated using the above method, then only, similar equipment estimated by analogy other methods of empirical data. 5, any method of calculation are likely to go awry, so that the actual selection of the refrigeration unit is too large or too small, so the above method is only for reference; a cold water machine operating procedures, starting a chiller, cooling tower fan motor start . 2, start the cooling water circulation pump. 3, the start of frozen water circulation pump. 4. Start the compressor motor. Second, the chiller stop 1, stop the compressor motor. 2, stop the freezing water circulating pump 3, stop cooling water circulation pump 4, stop cooling tower fan 5, good equipment, routine maintenance and repair, on-time running equipment inspection. 6, good environmental sanitation work within the unit range. Third, the operation precautions Electrical section 1, after checking the starting voltage is normal. (± 10%). 2, the power switch is pushed accurate. 3, ammeter amperage boot properly. System part 1, the motor is operating normally. 2, the operation of the machine if there is special noise and unusual sound. 3, circulating pumps and bottled water is good, the water pressure is normal. 4, the compressor pressure gauge index is normal (R-22 refrigerant low pressure gauge normal 3 ~ 5.5kg / cm2, a high pressure in the normal table 12 ~ 17kg / cm2). 5. View freeze frozen oil level within the oil level window is normal. (The oil of the oil gauge seen as normal). 6, when the low pressure switch or oil level switch trip, you should investigate the cause and repair before turning on power. 7, when the threshold voltage controller escape, must pay attention to the problem of voltage rise and voltage drop. 8, pay attention to whether the return pipe frost, should immediately check if frost. 9, confirm whether the oil spill. Evaporator section 1, whether the cooling water flow rate in accordance with regulations. Chilled water inlet and outlet temperature difference between 5 ℃, range 3 ~ 8 ℃ please confirm within range. 2, the chilled water outlet temperature is too low. Please confirm in the range of 5 ~ 15 ℃. 3, chilled water outlet temperature is stable. 4, an expansion valve is working properly. Compressor suction pipe is frost. Under no circumstances incompressible liquid. 5, superheat is 5 ~ 8 ℃ appropriate. A condenser section 1, the cooling temperature is too high. Cooling water into the water at 30 ℃, long-term operation of high voltage shall 15.0kg / cm2 [R-22]. 2, the condensing temperature and the cooling water outlet temperature difference is not too large. 3. refrigerant leaks. When the refrigerant leaks, high and low pressure are low, full load operating current is reduced. 4, undercooling 2 ~ 5 ℃. Fourth, other 1, temperature sensor start-stop - cycle of ten minutes, stop time is five minutes. Once the compressor stops, to be spaced more than 15 minutes and then start, switching frequency of the problem. 2, the protection device is functioning properly. Check regularly. Quality, service order to survive is Chuanhui sustainable human belief. "Select" Chuanhui "is to choose genuine!